JP2013132949A5

JP2013132949A5 -

Info

Publication number: JP2013132949A5
Application number: JP2011283514A
Authority: JP
Filing date: 2011-12-26
Publication date: 2015-01-22
Anticipated expiration: 2031-12-26

Description

請求項１記載の発明は、操舵するための操作部材（２）を含む操作機構（３）と、前記操作機構とは機械的に非連結であって、前記操作部材の操舵に基づいて車輪（４）を転舵させる転舵機構（５）とを有する操舵装置（１）であって、前記操作機構は、前記操作部材の操舵角度（θ）を検出する操舵角センサ（８）と、前記操作部材の操舵方向のみを検出する操舵方向検出手段（１１）とを含み、前記操舵方向検出手段は、前記操作部材の操舵方向に回転可能なねじシャフト（４０）と、前記ねじシャフトに螺合するナット（４１）と、前記ねじシャフトと平行に配置され、前記ねじシャフトの回転に伴って前記ナットをねじシャフトの軸方向（Ｊ）に沿って移動させるナットガイド（４２）と、前記ナットガイドの長手方向の少なくとも一端側に設けられ、前記ナットが前記軸方向に所定位置以上移動することを規制するストッパ（４３）と、前記ストッパと前記ナットとの当接を検出する当接検出手段（７０）とを含むことを特徴とする、操舵装置である。 According to the first aspect of the present invention, the operation mechanism (3) including the operation member (2) for steering and the operation mechanism are mechanically disconnected, and the wheel ( 4) a steering device (1) having a steering mechanism (5) for steering, wherein the operation mechanism includes a steering angle sensor (8) for detecting a steering angle (θ) of the operation member; look including a steering direction detecting means (11) for detecting only the steering direction of the operation member, the steering direction detection means includes a rotatable screw shaft (40) in the steering direction of the operation member, threaded on the threaded shaft A mating nut (41), a nut guide (42) arranged in parallel with the screw shaft and moving the nut along the axial direction (J) of the screw shaft as the screw shaft rotates, and the nut At least in the longitudinal direction of the guide Provided on an end side, wherein the nut comprises a stopper (43) which restricts movement of more than a predetermined position in the axial direction, the contact detection means and (70) for detecting the contact between the stopper and the nut This is a steering device.

請求項２記載の発明は、前記当接検出手段は、前記ストッパに設けられ、前記ナットの当接を検出する歪センサ（７４）を含むことを特徴とする、請求項１記載の操舵装置である。
請求項３記載の発明は、前記ナットから突設され、前記ストッパに当接する当接凸部（７１）を含むことを特徴とする、請求項２記載の操舵装置である。 According to a second aspect of the present invention, in the steering apparatus according to the first aspect, the contact detection means includes a strain sensor (74) provided on the stopper and detecting the contact of the nut. is there.
A third aspect of the present invention is the steering apparatus according to the second aspect, characterized in that the steering device includes a contact protrusion (71) protruding from the nut and contacting the stopper.

請求項４記載の発明は、前記歪センサは、前記ストッパにおいて前記ナットに対向する面（７２Ｃ）とは反対側の面（７２Ｄ）に設けられていることを特徴とする、請求項２または３記載の操舵装置である。
請求項５記載の発明は、前記ストッパに設けられ、前記歪センサが取り付けられており、弾性変形可能な取付部（７２）を含むことを特徴とする、請求項２〜４のいずれかに記載の操舵装置である。 Fourth aspect of the present invention, said strain sensor is characterized in that provided on the opposite side (72D) is a surface opposed to the nut in the stopper (72C), according to claim 2 or 3 It is a steering device of description.
Invention of claim 5, provided in the stopper, said and strain sensor is attached, characterized in that it comprises elastically deformable mounting portion (72), according to any one of claims 2-4 This is a steering device.

操舵方向検出手段は、ねじシャフト、ナット、ナットガイド、ストッパおよび当接検出手段を含む安価かつ簡素な構成であり、操作部材の操舵（ねじシャフトの回転）に伴ってナットがねじシャフトの軸方向に沿って移動してストッパに当接したことに基づいて、操作部材の操舵方向を検出できる。このような操舵方向検出手段を用いれば、操舵角センサの異常時においても操舵を継続できる構成を、部品点数増加やコスト上昇を一層回避しつつ実現できる。 Misao steering direction detecting means, screw shafts, nut, nut guide, inexpensive and simple configuration including the stopper and the abutment detection means, the axis of the nut screw shaft with the steering operation member (the rotation of the screw shaft) The steering direction of the operating member can be detected based on the fact that it moves along the direction and comes into contact with the stopper. If such a steering direction detecting means is used, a configuration capable of continuing steering even when the steering angle sensor is abnormal can be realized while further avoiding an increase in the number of parts and an increase in cost.

請求項２記載の発明によれば、歪センサによって当接検出手段を簡素に構成できるので、操舵角センサの異常時においても操舵を継続できる構成を、部品点数増加やコスト上昇をより一層回避しつつ実現できる。
請求項３記載の発明によれば、ナットの当接凸部がストッパに当接することによってストッパが相対的に大きく撓むことから、歪センサ（当接検出手段）は、ストッパとナットとの当接を高精度に検出できる。 According to the second aspect of the present invention, since the contact detection means can be simply configured by the strain sensor, the configuration in which the steering can be continued even when the steering angle sensor is abnormal can further avoid the increase in the number of parts and the cost increase. Can be realized.
According to the invention described in claim 3 , since the stopper is bent relatively large by the contact protrusion of the nut contacting the stopper, the strain sensor (contact detection means) is provided with a contact between the stopper and the nut. The contact can be detected with high accuracy.

請求項４記載の発明によれば、ナットがストッパに当接する際、ナットが歪センサにぶつかることを防止できるので、歪センサの故障を防止できる。
請求項５記載の発明によれば、ナットがストッパに当接すると、ストッパでは取付部が相対的に大きく撓むことから、取付部に取り付けられた歪センサ（当接検出手段）は、取付部の撓みに基づいて、ストッパとナットとの当接を高精度に検出できる。 According to the fourth aspect of the present invention, when the nut abuts against the stopper, the nut can be prevented from colliding with the strain sensor, so that the failure of the strain sensor can be prevented.
According to the fifth aspect of the present invention, when the nut comes into contact with the stopper, the attachment portion of the stopper bends relatively greatly. Therefore, the strain sensor attached to the attachment portion (contact detection means) The contact between the stopper and the nut can be detected with high accuracy on the basis of the deflection.

Claims

An operation mechanism including an operation member for steering, and a steering device having a steering mechanism that is mechanically disconnected from the operation mechanism and steers a wheel based on steering of the operation member. ,
The operating mechanism is
A steering angle sensor for detecting a steering angle of the operation member;
Look including the steering direction detection means for detecting only the steering direction of the operation member,
The steering direction detecting means includes
A screw shaft rotatable in the steering direction of the operating member;
A nut screwed onto the screw shaft;
A nut guide that is arranged in parallel with the screw shaft and moves the nut along the axial direction of the screw shaft as the screw shaft rotates;
A stopper that is provided on at least one end side in the longitudinal direction of the nut guide and restricts the nut from moving a predetermined position or more in the axial direction;
A steering apparatus comprising: contact detection means for detecting contact between the stopper and the nut .

The abutting detection means, provided in said stopper, characterized in that it comprises a strain sensor for detecting the contact of the nut, steering apparatus according to claim 1.

The steering apparatus according to claim 2 , further comprising an abutment protruding from the nut and abutting against the stopper.

The steering device according to claim 2 or 3 , wherein the strain sensor is provided on a surface of the stopper opposite to a surface facing the nut.

Wherein provided on the stopper, the and strain sensor is attached, characterized in that it comprises an elastically deformable mounting unit, a steering device according to any one of claims 2-4.